package com.example.demo.config;

import com.example.demo.common.AppVariable;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * 用户拦截器
 */
public class LoginIntercept implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        HttpSession session = request.getSession(false);
        if(session != null && session.getAttribute(AppVariable.SESSION_USERINFO_KEY) != null) {
            // 用户已登录
            return true;
        }
        // 跳转到登录页
        response.sendRedirect("/login.html");
        return false;
    }
}
